Wow I thought the demo for DKS was awesome. I played it for hours trying to see everything I could. I am so pumped for DKS to come out in the US soon (hopefully soon) I loved the combat, graphics, story, dialog and skill trees and I only played it a few hours. I watched a few videos of DKS on youtube and it looks fantastic. The dungeons look like alot of fun.
Alot of RPG's don't have demos. It is extremely hard to show what a 100 hour game has to offer. But I think they did a great job on the demo. Plus is was a few hours long and other demos last like 20 mintues.
If you want your friends to get exited about the game you could always show them the cool things you are currently doing on your playthrough. I am extremely exited to get this game
